sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Hardness: 6.5–7 on Mohs scale; Color: Red to brownish-red; Luster: Dull to vitreous; Crystal Structure: Hexagonal (Microcrystalline); Cleavage: None (Conchoidal fracture); Specific Gravity: 2.58–2.91

Hardness: 6
Color: Red to brownish-red
Luster: Dull to vitreous

Identified March 9, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the accumulation of fine-grained silica in hydrothermal veins or sedimentary environments. Its red color is derived from iron impurities during the lithification process over millions of years, often dating back to the Proterozoic or Paleozoic eras.

Uses & applications

Used widely in lapidary work for cabochons, beads, and carvings. Historically used for seals and amulets. Also used as decorative stone in architecture and for metaphysical/collecting purposes.

Geological facts

Red Jasper has been used since antiquity; it was known as the 'mother of all stones' in ancient Egypt and was often used in the pectoral ornaments of Egyptian pharaohs. It is a variety of chalcedony.

Field identification & locations

Identify in the field by its opaque deep red color, smooth waxy feel when polished, and inability to be scratched by a steel knife. Common locations include South Africa, Brazil, India, and the USA (California and Oregon).

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